Attachment for spinning frames



.Fufiy M 1953 J. HREDDLE mm. 9 9

I ATTACHMENT FOR SPINNING FRAMES Filed Dec. 29, 1948 5 Sheets-Sheet 13nventov$ Jere-R H. 51001.1;-

14541115? 672mm Rae-0 Gtkornegs July 10, 1951 J. H. RlDDLE ETALATTACHMENT FOR SPINNING FRAMES 5 Sheets-Sheet 2 Filed Dec. 29, 1948 I NVEN TORS J: 7141? ll- [P100]. 5

/V/u. T59 6149; R550 ATTOFIVE'V-S y 1951 J. H.. RIDDLE 1-341. 2,560,476

ATTACHMENT FOR SPINNING FRAMES Filed Dec. 29, 1948 5 Sheets-Sheet 5I'mnentors .7275? h. Flop/,5

Gttornegs July 10, 1951 J. H. RIDDLE ETAL 2,560,476

ATTACHMENT FOR SPINNING FRAMES Filed Dec. 29, 1948 5 'She't'S-Sheet 4fig. .9

Jl'fl? H. 6 70am? mun? 640105 19550 IN V EN TORS July'lO, 1951 J. H.RIDDLE EI'AL. 2,560,476

ATTACHMENT FOR SPINNIIINGY FRAMES Filed Dec. 29, 1948 5 Sheets-Sheet 5lira? l1. P/00Lf INVENTORS Patented July 10, 1951 STATES .r or-Fiea2,560,476 ATTACHMENT FO erene mess of lliiassachusetts- ApplicationDecember 29, 1948, Sg ria'l No 67,928

7 laims- 1 This invention relates to spinning frames, and more"particularly to an attachment for such frames adapted to avoid defectivewinding of bobbins formed on the frames.

'It is common practice in processing yarn on a spinning frame to feed areinforcing thread so that it is wound about the yarn to strengthen it.The yarn which is fed for reinforcing in this manner is usually referredto as filling, and the reinforcing thread is known as a reinforcingthread; the strengthened yarn being characterized by a spiraldisposition of the reinforcing thread about the filling yarn.Strengthened yarn of this sort is used extensively, for example, in themanufacture of blankets and blanketing.

One of the troublesome problems encountered in processing yarn in thismanner is that the relatively weak filling yarn is subject to frequentbreaking with the result that the stronger reinforcing thread remainstrained along through themachine for Winding onto the bobbins beingbuilt. As a single operator is commonly assigned to a number of frames,this situation can continue unattended for a considerable period withconsequent defective winding of the bob.- bins and resulting seconds insubsequent weaving operations if the defective bobbins are notdiscovered.

Prior attempts have been made to avoid the above difiiculty by providinga thread breaking means which will sever the reinforcing thread wheneverthe filling yarn breaks and thuspreventrwinding of the reinforcingthreadalone onto the bobbins. These prior devices are somewhat.complicated in their mechanical constructionand have not been adoptedgenerally. Oneof the fgatures of our present; invention is'that itprovides avery simple mechanism which is free of mechanicalcomplications and ispractically foolproof in its operation. This devicecomprisesga slotted member adapted for mounting on a spinning frameonwhich the filling yarnandreinforcing thread are combined by the usualtwisting operation, and the slotted memberbeing arranged adjacent to thetravel of the twistedfilling yarn and reinforcing thread suchthat theywill not, enter the slot in this member but when the filling yarn breaksand the reinforcing thread is traveling alone, it will promptly enterthe. slot and besevered and thereby prevented from .con-

tinuing to wind onto the bobbin withoutthefi-lling yarn.

This. slotted member may be either in thesform of a fixed plate mountedon the frame. guide bar at each twister. location :and having" at.leastone slot or notch formed therein and with sufficiently sharp edgesto effect a shearing actionon the shit; or the slots maybe formeddirectly 'iinthe guide bar and this bar caused to reciprbate, 'e'n'gaging insliding contact therewith a stationary member with which itforms a shearing action for severing or cutting of the reinforcingthread as the latter is brought into contact-with the stationarymernberby the slotted reciprocating member;

described herein and shown in the accompanying drawing, the threadbreaking means" is embodied in a twister frame which representstheprincipal field of application, though this invention may be adapted foruse on'other types of spinning frames.

Briefly described, one form of the thread breaking' means of the presentinvention'comprises a plate adapted for disposition ata suitabl'e'pointin a spinning frame such as a twister frame" in relation to the fillingyarn and associated'reinforcing thread, and formed with an edge having aconfiguration characterized by aplurali'tyof slits extendinginto thebody of the thread breaking plate transversely with respect to'this'edge ahd'adapted to receive and grip the "reinforhing thread and therebysever" it whenever the reinforcing thread is trained through fth'etwister frame alone u on breaking of the fillingya'rn. Another importantform of .thetli'rea'd breaking means of the present invention comprises[an filfeneementfmwhichthe guise bar er the twister fr me isreciprocated and is fo rmed for entit iping .the reinforcing threadwheniit is trained when w wsi j fr' e' u o br iegp i efi in ra e n iwmweantry n eans formedlfor supporting the guide bar for eei r etion dspose o s e r n actio w th th .r i l bq ti s ui bar wh e y threinforcing thread is severed when entrapped.

The invention is described more in detail,- below in connection with theaccompanying ,drawing..=in.which:

Fig. 1 is a fragmentaryfront elevation .ofa twister frame illustratingthe .operativedispositionofthe thread breakingplates ontheguide ar;

Big. 2 is a. corresponding side elevation;

liig. -3 is an enlarged front detail ofv this form of .the thread.breaking means;

Fig. 4' isa corresponding. plan detail;

.aFig. 5; is; a perspective. detail of. the. relative d-is.- positionofthis formpf the. thread breaking 3 means and the filling yarn andassociated reinforcing thread trained through the frame;

Fig. 6 is a corresponding perspective detail illustrating the operationof this form of the thread breaking means in severing the reinforcingthread when the filling yarn breaks;

Figs. '7 and 8 are respective front and bottom plan views illustratingan arrangement of this form of the thread breaking means disposed on theguide plate of the twister frame;

Fig. 9 is a fragmentary front elevation of a twister frame illustratingthe operative disposition of the reciprocating guide bar form of thethread breaking means of the present invention;

Fig. 10 is a perspective detail of the relative disposition of thereciprocating guide bar form of the thread breaking means and thefilling yarn and associated reinforcing thread trained through theframe; and,

- Fig. 11 is a corresponding perspective detail illustrating theoperation of the reciprocating guide bar form of the thread breakingmeans in severing the reinforcing thread when the filling yarn breaks.

- Referring at first to Figs. 1 and 2 of the drawing, the dispositionand arrangement of the thread breaking plates ill of the preseentinvention are shown in relation to a usual type of twister frame inwhich a yarn package H is dis- I through a pair of drawing rolls [5, andis angled over a guide bar l6 to a twister head [1. Beyond the twisterhead H, the filling yarn I2 is extended through a second pair of drawingrolls l8, and through a guide plate [9 to a ring and traveller mechanismfor winding onto the bobbins 2i being built.

The reinforcing threads l3 are taken off of the packages l4 over a guiderod 22 and are looped around a second guide rod 23 so as to be spiraledonto the filling yarn l2 by the action of the twister head l1 on thelength of filling yarn extending from the first pair of drawing rollsl5. And the reinforcing threads 13 are carried forward in this mannerwith the filling yarn I2 to be built into the bobbins 2| being formed onthe frame, as illustrated.

- Now when the filling yarn l2 breaks, as frequently happens duringnormal operation of the twister frame, if the break occurs below thesecond pair of drawing rolls IS, the broken end will be taken up on theclearer roll 24; or if the break occurs above these rolls the fillingyarn will accumulate at some other point on the machine as it is fed bythe first pair of drawing rolls l5. In any event, the stronger reinforinthread I3 will remain trained through the frame, as mentioned above, andwill be wound onto the bobbins 2| alone as operation of the framecontinues, unless this result is prevented.

It has been noted above that detection of this situation by an operatortending several frames may be delayed for a considerable period so thatthe possibility of winding defective bobbins is continually present. Toremedy this difficulty, the thread breaking plate I!) of the presentinvention is disposed on the twister frame, appropriately in associationwith the guide bar IG- as shown in Figs. 1 and 2, to sever thereinforcing thread [3 Whenever it is trained through the frame aloneupon breaking of the filling yarn l2.

The form and arrangement of the thread breaking plate It is illustratedmore in detail in Figs. 3 and i of the drawing. As shown, the threadbreaking plate IEI comprises a relatively thin strip of metal, suitablya strip of spring steel or the like, formed for attachment to the guidebar It as by screws 25. As mentioned above, the filling yarn l2 andassociated reinforcing thread [3 are angled over the guide bar It asthey are lead to the twister head I1, and the thread breaking plate it]is mounted on the guide bar 16 so that the plate i0 is spaced from thefilling yarn l2 and associated reinforcing thread [3 when they aretrained together through the machine.

When the filling yarn l2 breaks leaving the reinforcing thread 13extended over the guide bar it alone, the disposition of the reinforcingthread l3 from the package M causes the reinforcing thread l3 to shiftto the right on guide bar l6 (compare Fig. l), and a slot 26 is formedin the top of guide bar It to receive the reinforcing thread I3 when itshifts in this manner. The slot 26 is angled slightly, as indicated inthe drawing, to correspond with the angled disposition of thereinforcing thread I3 as it shifts. This slot 26 communicates with anaperture 21 in the body of guide bar It, so that when the reinforcingthread I3 is received in slot 26 it is directed into the aperture 21 andaccordingly comes into contact with the thread breaking plate Ill.

The thread breaking plate I0 is arranged with a configurated edgedisposed for contact by the reinforcing thread It, the configuration ofthis edge being characterized by a plurality of slits 28 extending intothe body of the thread breaking plate In and oriented transversely withrespect to the edge. The slits 28 are preferably formed by shearing thethread breaking plate so that the portions defined by the slits aredisplaced with respect to each other and with respect to the body of thethread breaking plate in, as illustrated in Figs. 3 and 4. Thisarrangement conditions the slits 28 with spaced edges at their open endsand a tapered throat, so that they are adapted to receive a reinforcingthread directed into contact with the edge of the thread breaking plateI0 and grip the reinforcing thread as it works into the tapered throat,and thus effect severing of the reinforcing thread.

This action of the thread breaking plate I!) is illustrated in Figs. 5and 6 of the drawing. In Fig. 5 the disposition of the filling yarn l2and associated reinforcing thread l3 when trained through the frametogether is shown in relation to the thread breaking plate It]. Underthese circumstances, the filling yarn l2 and reinforcing thread l3 arespaced from the thread breaking plate It by the guide bar I6, as notedabove. Upon breaking of the filling yarn l2, however, the reinforcingthread I3 will shift as described above until it reaches the slot 26 andis thereby directed into the aperture 21 and into contact with the edgeof the thread breaking plate l0. When this happens, the reinforcingthread I 3 will find one of the slits 28 and enter it to be gripped andbroken as illustrated in Fig. 6.

The action of the thread breaking plate I!) is thus automatic, and theparticular bobbin 2| involved will continue to rotate without windingyarn until the operator tending the twister frame reaches this point andrepairs the break in the filling yarn i2. As a result, defective windingof the bobbins 2| because of broken filling yarn is entirely avoided.

The above described arrangement of the thread 1 5 breaking plate In onthe guide bar I6 "has been 'found "to be advantageous and convenientbecause the thread breaking 'plate Hlis easily installed at "this pointand is in full view so that breaks in the filling yarn are easilydetected. 'I t shouldbe noted, however, that the thread breaking plateI0 may be mounted at any other suitable point on the twister frame, ifdesired. For example, a suitable alternative arrangement of the threadbreaking plate Ill on the guide'plate I9 is illustra'ted in "Figs. '7and 8 of the drawing. According to this arrangement, the thread breakingplate ID is mounted on the bottom or the guide-plate I9, as by screws29, so that the'edg'e -config'iirated by the slits 2-8 is disposed forcontact with a filling yarn and asscciat'ed'reinforcing thread extendedthrough the guide plate. When the filling yarn and reinforcing threadare associated, the diameter of the resulting strand is too large to fitinto any of the slits 28 and the strand will accordingly-ride 'over theedge 'of the thread breaking plate I0. Upon breaking of the fillingyarn, however, the remaining reinforcing thread will find one of theslits 28- and be received and gripped in this slit, and thereby severed,in the same manner as described above. The thread breaking plate It! maylikewise be disposed at'any other'suitable point-in the'twisterframes'ystem as may be convenient-or necessary in particularcircumstances.

The reciprocating guide bar form of the thread breaking means of thepresent invention is shown in Fig. 9 of the drawing. This formcomprises'an arrangement for reciprocating the guide bar I6 which isformed with a slot 30 for entrapping the reinforcing thread I3, asdescribed further below. Studs 3I, which are disposed for shearingaction with the slotted portions of guide bar I6, are attached to thetwister frame, as by lock nuts 32, for supporting the guide bar I6 forreciprocation. The studs 3I have heads 33 formed with grooves 34 forsupporting the reciprocating guide bar I6 horizontally on the frame, andthe edges of these grooves 34 cooperate with the edges of the slots 30to effect the above mentioned shearing action. The guide bar I6 isreciprocated by a rocker arm 35, which is mounted on a rock shaft 36actuated from a crank plate 31, or cam or the like, and connected to oneend of the guide bar I6 by a pivoted connecting link member 38 which isarranged with a screw adjustment as at 39 for positioning thereciprocating traverse of the guide bar I6 with respect to the studs 3|.

The form and arrangement of a stud 3| and a portion of the reciprocatingguide bar I 6 and their association on the frame before and after thefilling yarn I2 breaks and the reinforcing thread I3 is severed areillustrated in detail in Figs. and 11 of the drawing. The slot 30, likethe slot 26 described above in another embodiment, is angled slightly,as indicated in the drawing, to correpond with the angled disposition ofthe reinforcing thread I3 as it shifts, as described further below.

As shown in Fig. 10, the filling yarn I2 and the associated reinforcingthread I3, when they are angled over the reciprocating guide bar I6, arepositioned from the slot 3!] and from the stud 3|.

The slot 3!] is formed with a width smaller than '6 alone, thedisposition of thereinforcingthread1:3 from the pa'ckage I4 causes thereinforcing thread I3 to shift to the right on the guide bar IS, theshifting of the reinforcing thread I3 and thereciprocation of'the'guidebar I6 coacting todirect the reinforcing thread I3 into the angled slot30. The guide bar I6 is reciprocated constantlyduring the operation ofthe twister frame by the crank plate actuated'rocker arm 35 so that thereinforcing thread I3, after passing into the angled slot 30, isentrapped in the slot 30andis directed-by the horizontal movement ofthe. guide bar 1-6 in 'thegrooves 34 against'the cooperating edgesof'the groove 36 and the edges of the slot 3 0, thereby severing thereinforcing thread I3. by a shearing action as shown in Fig. 11 of-'.the drawing. 1

'--Like-the acti0nof thethread breaking plate I0, the action of thereciprocating'guide'bar form :of the thread breaking means is automatic,and the particular bobbin 2I involved will continue rotate withoutwinding any material thereon until attended to by the operator. Thus,defective winding of the bobbins resulting'from' brokenfilling yarn iseliminated.

We'claim:

1. 'In a spinning frame in which a filling yarn and reinforcing threadare twisted together, lead over a guide bar, and wound onto a bobbin,the improvement comprising a reciprocating slotted member over which thetwisted filling yarn and reinforcing thread travel, the slot insaid'mem-v ber having an insufficient width to accommodate the combinedfilling yarn and reinforcing thread, but having sufiicient width toaccommodate said reinforcing thread alone when the filling yarn breaks,and a fixed cooperating member with which said reciprocating member isassociated in sliding contact and which will effect shearing of saidreinforcing thread in said slot when the reciprocating member brings thereinforcing thread in contact with this fixed member.

2. A spinning frame as defined in claim 1 and in which said slottedreciprocating member is the guide bar on the spinning frame and isslotted adjacent to each individual twister location.

3. An attachment for spinning frames of the type in which a reinforcingthread is fed for association with filling yarn, comprising means formedfor entrapping the reinforcing thread when said reinforcing thread istrained through the spinning frame alone upon breaking of said fillingyarn, stationary means formed for supporting said entrapping means anddisposed for shearing action with said entrapping means, and means forreciprocating said entrapping means for shearing action with saidstationary means so that the reinforcing thread is severed whenentrapped.

4. An attachment for spinning frames of the type in which a reinforcingthread is fed for association with filling yarn, comprising areciprocating guide bar slotted for entrapping the reinforcing threadwhen said reinforcing thread is trained through the spinning frame aloneupon breaking of said filling yarn, stationary means formed forsupporting said guide bar and disposed for shearing action with theslotted portion of said guide bar, and means for reciprocating saidguide bar for shearing action with said stationary means so that thereinforcing thread is severed when entrapped.

5. An attachment for spinning frames of the type in which a, reinforcingthread is fed for association with filling yarn, comprising areciproeating guide bar formed with a slot positioned to entrap thereinforcing thread when said reinforcing thread is trained through thespinning frame alone upon breaking of the filling yarn. a stud having agrooved head for supporting said guide bar horizontally on the frame,and means for reciprocating said guide bar so that the entrappedreinforcing thread is directed against the edges formed by the groovedhead of the stud thereby severing the reinforcing thread by a shearingaction.

6. In a spinning frame, the combination with means for. feeding aplurality of reinforcing threads for association with strands of fillingyarn and jmeans for building the associated strands .ioffilling yarn andreinforcing threads into bobbins, of thread breaking means forpreventing defective winding of said bobbins, said thread breaking meanscomprising a guide bar mountedfor reciprocation on said spinning frameand formed with slots positioned to entrap the reinforcing threads whensaid reinforcing threads are; trained through the spinning frame aloneupon breaking of said strands of filling yarn, stud members havinggrooved heads supporting said guide bar for reciprocation on the frame,means for reciprocating said guide bar, and means for positioning saidguide bar with respect to said stud members whereby an entrappedreinforcing thread is severed by the shearing action of the grooved headof a stud member with the slotted portion of said guide bar. 1

7. In a spinning frame, the combination with means for feeding areinforcing thread for association with a filling yarn and means forbuilding the associated filling yarn and reinforcing thread intobobbins, of thread breaking means comprising a guide bar mounted forreciprocation on said spinning frame and formed for entrapping thereinforcing thread when said reinforcing thread is trained through thespinning frame alone upon breaking of said filling yarn, stationarymeans supporting said guide bar for reciprocation on said spinning frameand disposed for shearing action with the entrapping portion of saidguide bar, and means for reciprocating said guide bar for shearingaction with said stationary means so that the reinforcing thread issevered when entrapped.

JETER H. RIDDLE. WALTER GARVIS REED.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS

